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annotate graal/com.oracle.truffle.dsl.processor/src/com/oracle/truffle/dsl/processor/parser/TemplateMethodParser.java @ 16851:2db61eddcb97

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Truffle-DSL: argument syntax support for guards
author Christian Humer <christian.humer@gmail.com>
date Mon, 18 Aug 2014 18:41:16 +0200
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children 62c43fcf5be2
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16851
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1 /*
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2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 package com.oracle.truffle.dsl.processor.parser;
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24
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25 import java.lang.annotation.*;
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26 import java.util.*;
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27
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28 import javax.lang.model.element.*;
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29 import javax.lang.model.type.*;
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30 import javax.lang.model.util.*;
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31
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32 import com.oracle.truffle.dsl.processor.*;
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33 import com.oracle.truffle.dsl.processor.java.*;
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34 import com.oracle.truffle.dsl.processor.model.*;
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35
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36 public abstract class TemplateMethodParser<T extends Template, E extends TemplateMethod> {
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37
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38 protected final T template;
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39 private final ProcessorContext context;
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40 private final MethodSpecParser parser;
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41
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42 private boolean parseNullOnError;
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43
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44 public TemplateMethodParser(ProcessorContext context, T template) {
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45 this.template = template;
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46 this.context = context;
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47 this.parser = new MethodSpecParser(template);
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48 }
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49
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50 public void setParseNullOnError(boolean parseNullOnError) {
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51 this.parseNullOnError = parseNullOnError;
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52 }
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53
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54 public boolean isParseNullOnError() {
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55 return parseNullOnError;
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56 }
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57
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58 public MethodSpecParser getParser() {
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59 return parser;
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60 }
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61
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62 public ProcessorContext getContext() {
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63 return context;
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64 }
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65
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66 public TypeSystemData getTypeSystem() {
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67 return template.getTypeSystem();
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68 }
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69
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70 public abstract MethodSpec createSpecification(ExecutableElement method, AnnotationMirror mirror);
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71
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72 public abstract E create(TemplateMethod method, boolean invalid);
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73
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74 public abstract boolean isParsable(ExecutableElement method);
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75
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76 public Class<? extends Annotation> getAnnotationType() {
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77 return null;
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78 }
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79
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80 public final List<E> parse(List<? extends Element> elements) {
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81 List<ExecutableElement> methods = new ArrayList<>();
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82 methods.addAll(ElementFilter.methodsIn(elements));
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83
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84 List<E> parsedMethods = new ArrayList<>();
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85 boolean valid = true;
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86 int naturalOrder = 0;
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87 for (ExecutableElement method : methods) {
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88 if (!isParsable(method)) {
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89 continue;
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90 }
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91
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92 Class<? extends Annotation> annotationType = getAnnotationType();
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93 AnnotationMirror mirror = null;
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94 if (annotationType != null) {
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95 mirror = ElementUtils.findAnnotationMirror(getContext().getEnvironment(), method, annotationType);
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96 }
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97
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98 E parsedMethod = parse(naturalOrder, method, mirror);
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99
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100 if (method.getModifiers().contains(Modifier.PRIVATE) && parser.isEmitErrors()) {
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101 parsedMethod.addError("Method annotated with @%s must not be private.", getAnnotationType().getSimpleName());
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102 parsedMethods.add(parsedMethod);
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103 valid = false;
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104 continue;
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105 }
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106
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107 if (parsedMethod != null) {
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108 parsedMethods.add(parsedMethod);
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109 } else {
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110 valid = false;
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111 }
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112 naturalOrder++;
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113 }
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114 Collections.sort(parsedMethods);
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115
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116 if (!valid && isParseNullOnError()) {
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117 return null;
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118 }
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119 return parsedMethods;
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120 }
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121
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122 private E parse(int naturalOrder, ExecutableElement method, AnnotationMirror annotation) {
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123 MethodSpec methodSpecification = createSpecification(method, annotation);
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124 if (methodSpecification == null) {
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125 return null;
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126 }
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127
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128 TemplateMethod templateMethod = parser.parse(methodSpecification, method, annotation, naturalOrder);
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129 if (templateMethod != null) {
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130 return create(templateMethod, templateMethod.hasErrors());
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131 }
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132 return null;
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133 }
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134
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135 public final E create(String id, int naturalOrder, ExecutableElement methodMetadata, AnnotationMirror mirror, TypeMirror returnType, List<TypeMirror> parameterTypes) {
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136 TemplateMethod method = parser.parseImpl(createSpecification(methodMetadata, mirror), naturalOrder, id, methodMetadata, mirror, returnType, parameterTypes);
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137 if (method != null) {
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138 return create(method, method.hasErrors());
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139 }
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140 return null;
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141 }
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142 }